We meet your specific plastic component needs utilizing our precision plastic machining and plastic polishing technology.


Plastic Machining Lathe

Our CNC Machining equipment can process a wide range of components from micro turning to 20 inches in diameter. Equipped with milling heads and subspindles, our lathes can produce many components complete with efficient cycle times. The best and most consistent components in plastic machining are produced without secondary operations such as deburring.




Plastic Milling

At MK Manufacturing, we have assembled a state of the art plastic milling department for plastic machining. We are proud to produce mill components with a high degree of consistency to close tolerances with no burrs. Surface finishes can be optical-quality grade as needed via plastic polishing. Complex components are easily manufactured through the direct import of files from most CAD systems for precision machining.




Micro Plastic Machining

MK has developed a unique high precision machining process for micro plastic machining. Our capabilities far surpass the usual in standard CNC Machining practice. In particular, for the most precise plastic fabrication of micro components, MK tolerancing is +/-.0005 or better with exceptional surface finish. These requirements are met while producing complex configurations in runs from 100 – 100,000 pieces. If required, similar accuracy can be maintained during polishing as well.





The most common plastic polishing methods are vapor polishing, flame polishing, and mechanical buffing. Each process is best suited for particular configurations and materials.


  • Flame polishing uses a hot flame to flow a surface. Operator skill is critical with this method. When done properly, flame polishing produces the clearest finish, especially on acrylics. Flat external surfaces are the most applicable configuration for this method.
  • Mechanical polishing is the most common, easiest to do, and is useful on any plastic. This method tends to leave very fine scratches on the surface and while it will usually look nice, it is not an acceptable polishing method for optical work. In addition, buffing would degrade the surfaces of the two other methods above.





Annealing of Plastics
Annealing, or stress relieving, of plastics is an important step in the plastic machining process. While not all components require annealing, it can provide important advantages for some materials and part configurations. Many manufacturers believe that their own internal annealing process is sufficient. However, in practice, batch processing can yield inconsistent results.
MK Manufacturing has multiple programmable ovens for precise control during the stress relieving process making our plastic fabrication capabilities superior. Our own annealing process allows us to create highly consistent material qualities from one rod to the next for the highest precision machining possible.